1.
Which of the following is the meaning of the acronym PAGASA?
Correct Answer
B. pHilippine AtmospHeric, GeopHysical and Astronomical Services Administration
Explanation
The correct answer is "Philippine Atmospheric, Geophysical and Astronomical Services Administration." This is the correct meaning of the acronym PAGASA, which refers to the organization responsible for providing weather and climate information in the Philippines. The other options either include incorrect terms or do not accurately represent the full scope of the organization's services.
2.
Different seasons and eclipses exist for which of the following phenomenon?
Correct Answer
A. The movement of the Earth around the Sun and the Moon around the Earth
Explanation
Different seasons and eclipses exist due to the movement of the Earth around the Sun and the Moon around the Earth. The Earth's orbit around the Sun causes the change in seasons, as the tilt of the Earth's axis determines the amount of sunlight each hemisphere receives. The Moon's orbit around the Earth causes eclipses, as it occasionally aligns with the Sun and Earth, casting a shadow on one another. The movement of the Sun around the Earth and the movement of the Earth around the Moon do not cause these phenomena.
3.
Seasons change due to what particular reason?
Correct Answer
C. The Earth is tilted and revolves around the sun
Explanation
The correct answer is The Earth is tilted and revolves around the sun. This is because the Earth's axis is tilted at an angle of about 23.5 degrees relative to its orbit around the sun. As the Earth revolves around the sun, different parts of the planet receive varying amounts of sunlight, leading to changes in temperature and weather patterns. This tilt is what causes the seasons to change throughout the year.
4.
When the direct rays of the sun hit the Northern hemisphere, what season would this be?
Correct Answer
C. Summer
Explanation
When the direct rays of the sun hit the Northern hemisphere, it is summer. This is because during summer, the Northern hemisphere is tilted towards the sun, causing the sun's rays to be more direct and intense. This leads to longer days, higher temperatures, and the characteristic warm weather associated with the summer season.
5.
Only one hemisphere receives direct rays from the sun. This is so because:
Correct Answer
D. the Earth is tilted
Explanation
The correct answer is that the Earth is tilted. This is because the Earth's axis is tilted at an angle of about 23.5 degrees relative to its orbit around the sun. This tilt causes the different hemispheres to receive varying amounts of direct sunlight throughout the year, leading to the changing of seasons. If the Earth was not tilted, both hemispheres would receive equal amounts of direct sunlight and there would be no seasonal variations.
6.
During what specific months do we experience a cold climate in the Philippines?
Correct Answer
B. December to February
Explanation
In the Philippines, the months of December to February are when we experience a cold climate. This is because these months fall within the country's dry season, which is characterized by cooler temperatures and lower humidity. During this time, the northeast monsoon or "amihan" prevails, bringing in cool and dry air from Siberia. This results in cooler temperatures, especially in the northern parts of the country, making it the cold season in the Philippines.
7.
The following are correct definitions of "direct rays" but one.
Correct Answer
D. The rays are horizontal and hits the ground at 180 degrees
Explanation
The correct definitions of "direct rays" are that the rays of the sun hit the ground at 90 degrees, the rays are vertical or perpendicular to the ground, and when the Sun's rays strike the ground at a high angle, each square meter of the ground receives a greater amount of solar energy than when the rays are inclined. However, the statement "The rays are horizontal and hits the ground at 180 degrees" is incorrect because horizontal rays would not hit the ground at 180 degrees, but rather parallel to the ground.
8.
What season results when a long day follows a short night?
Correct Answer
A. Summer
Explanation
When a long day follows a short night, it indicates that the daylight hours are longer than the nighttime hours. This pattern is typically observed during the summer season. In summer, the Earth's axis is tilted towards the Sun, causing the Sun to be higher in the sky and resulting in longer days and shorter nights. Therefore, the correct answer is Summer.
9.
Of the following descriptions about the term Equinox, which one is not true?
Correct Answer
D. It is the imaginary line that divides the northern hemispHere to the southern hemispHere
Explanation
The equinox is the midway point between the two seasonal extremes, occurring twice within the year. The literal translation of equinox means "equal night." However, it is not the imaginary line that divides the northern hemisphere to the southern hemisphere. This line is known as the equator.
10.
Which among the following is the right vertical shadow angle for summer solstice?
Correct Answer
A. The vertical shadow angle for a vertical equator-facing object is at its minimum at solar noon.
Explanation
The vertical shadow angle for a vertical equator-facing object is at its minimum at solar noon because at this time, the sun is directly overhead and there is no shadow cast by the object. As the day progresses, the sun moves lower in the sky, causing the shadow to lengthen and the angle to increase. Therefore, the vertical shadow angle is not constant throughout the day. Additionally, the question specifically asks for the vertical shadow angle for summer solstice, which is the day with the longest period of daylight in the year.
11.
In the image shown of a solar eclipse, at what direction is the moon casting its shadow?
Correct Answer
C. East
Explanation
During a solar eclipse, the moon comes between the sun and the Earth, causing the moon's shadow to fall on the Earth's surface. The direction of the moon's shadow depends on the position of the sun and the moon relative to the Earth. In this case, since the sun is to the west of the moon, the moon's shadow would be cast towards the east. Therefore, the correct answer is East.
12.
As the Earth goes around the Sun, the northern and southern hemispheres are alternately exposed to the direct rays of the sun which leads to:
Correct Answer
A. The changes in seasons
Explanation
The correct answer is "The changes in seasons." As the Earth orbits the Sun, the tilt of its axis causes different parts of the planet to receive varying amounts of sunlight throughout the year. This variation in sunlight leads to the changes in seasons, with the hemisphere tilted towards the Sun experiencing summer and the hemisphere tilted away experiencing winter.
13.
As the Moon goes around the Earth, it sometimes forms a straight line with the Sun and Earth leading to the occurrence of :
Correct Answer
C. Eclipses
Explanation
When the Moon aligns with the Sun and Earth, it can cause two types of eclipses - solar and lunar. A solar eclipse occurs when the Moon passes between the Sun and Earth, blocking the sunlight and casting a shadow on Earth. A lunar eclipse occurs when the Earth passes between the Sun and Moon, causing the Earth's shadow to fall on the Moon. These alignments result in the occurrence of eclipses.
14.
What phase of the moon is shown in the image?
Correct Answer
A. Waning gibbous
Explanation
The correct answer is Waning gibbous. This can be determined by observing the image which shows a moon that is more than half illuminated but less than fully illuminated, and the illuminated portion is on the left side. This phase occurs after the full moon and before the last quarter.
15.
This eclipse occurs when the umbra of the moon's shadow touches a region on the surface of the Earth.
Correct Answer
B. Total Solar Eclipse
Explanation
A total solar eclipse occurs when the umbra of the moon's shadow touches a region on the surface of the Earth. In this type of eclipse, the moon completely covers the sun, creating a temporary darkness on Earth. This is different from a partial solar eclipse, where only a portion of the sun is covered by the moon, and an annular solar eclipse, where the moon appears smaller than the sun, leaving a ring of sunlight visible around it. Therefore, the correct answer is Total Solar Eclipse.
16.
This eclipse occurs when the penumbra of the Moon's shadow passes over a region on the Earth's surface.
Correct Answer
C. Partial Solar Eclipse
Explanation
A partial solar eclipse occurs when the penumbra of the Moon's shadow passes over a region on the Earth's surface. In this type of eclipse, the Moon partially blocks the Sun, creating a shadow on the Earth. As a result, only a portion of the Sun is obscured from view, creating a partial darkening of the sky. This is different from a total solar eclipse, where the Moon completely covers the Sun, and an annular solar eclipse, where the Moon is farther from the Earth and does not fully block the Sun, creating a ring of light around the Moon.
17.
The following are characteristics of a Spring tide but one.
Correct Answer
C. Moon is at right angle to the sun
Explanation
A Spring tide is a tide with the greatest difference between low and high tide. This occurs when the gravity of the sun and moon pull in the same direction, which happens during a new moon and a full moon. The moon being at a right angle to the sun does not contribute to the characteristics of a Spring tide.
18.
When the sunlight reflects off on the moon's near side, what phase of the moon would this be?
Correct Answer
A. Full moon
Explanation
When the sunlight reflects off on the moon's near side, it illuminates the entire visible face of the moon, creating a full moon. This occurs when the moon is positioned opposite the sun, with the Earth in between. The full moon appears as a complete circle and is the brightest phase of the moon.
19.
When the sunlight reflects off the moon's far side, what phase of the moon is this called?
Correct Answer
D. New moon
Explanation
When the sunlight reflects off the moon's far side, this is called a new moon. During a new moon, the moon is positioned between the Earth and the sun, so the side of the moon facing Earth is not illuminated and appears dark. The sunlight that reflects off the moon's far side is not visible from Earth, creating the appearance of a new moon.